Wide field of view monocentric lens system for infrared aerial reconnaissance camera systems
US9329365B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 23, 2011 |
| Grant date | May 3, 2016 |
| Priority date | — |
| Expiry date | Mar 4, 2035 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B13/14
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A wide field of view monocentric lens system for an infrared aerial reconnaissance camera includes front and rear lens shell elements and a core lens element, with the number of front and rear shell lens elements depending on the IR band of interest (LWIR, MWIR or SWIR). Infrared radiation entering the monocentric lens passes sequentially through the front shell lens element(s), the core lens element, and the rear shell lens element(s) and is focused onto a curved focal surface. The front shell lens element(s) and the rear shell lens element(s) are made of material having a relatively higher refractive index or a relatively higher optical dispersion, or both, in the band of interest, as compared to the core lens element.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.